/Engine/Source/Editor/BlueprintGraph/Classes/EdGraphSchema_K2.h
Checks to see if the passed in function is valid in the graph for the current class
bool CanFunctionBeUsedInGraph ( const [UClass](API\Runtime\CoreUObject\UObject\UClass) * InClass, const [UFunction](API\Runtime\CoreUObject\UObject\UFunction) * InFunction, const [UEdGraph](API\Runtime\Engine\EdGraph\UEdGraph) * InDestGraph, uint32 InFunctionTypes, bool bInCalledForEach, [FText](API\Runtime\Core\Internationalization\FText) * OutReason ) const